Public school art teacher autonomy in a segregated city: Affordances and contradictions

Over the past two decades, the Chicago Public Schools have seen a lot of change. First there was the opening of magnet schools, and other gestures at reform, followed by school closures and the flourishing of charter schools. In this essay, two former Chicago art teachers, one who taught in a prominent college prep magnet high school on the north side, and one who taught in an under-resourced neighborhood high school on the south side, examine the commonalities of their otherwise divergent experiences, particularly with regard to the freedom allotted to both them and their students by the administrative affordances in their respective situations. While the schools were starkly different in numerous respects, the surprising ability of both teachers to lead collaborative projects that they and their students found engaging, partly through reaching outside the bounds of the institution, may offer an example of teacher autonomy and emergent pedagogy that seems particularly relevant to the public school setting

Women in the international defence and security space : gender equity in south american armed forces : the cases of a rgentina and Chile

Los países sudamericanos han avanzado en la incorporación de mujeres a las fuerzas armadas; sin embargo, existe una gran heterogeneidad en los procesos de incorporación femenina a su esfera. La presente investigación analiza la equidad de género dentro del ámbito militar, principalmente en Argentina y Chile, y muestra cómo aún se necesitan políticas de estado para que aquella se fortalezca y no sea solo propósito o deseo sino tema de agenda en las políticas públicas de los Ministerios de Defensa de los países sudamericanos.South American countries have advanced in incorporating women to their armed forces; nevertheless, there are great differences in the processes of feminine incorporation to their sphere. The present investigation analyzes gender equity within the military space, mainly in Chile and Argentina, showing how state policies are still needed in order to strengthen it, so that it may not only remain as a purpose or wish but an item on the agenda of public policies of South American Ministries of Defence.Fil: Lucero, Mariel R.. Universidad Marcelino Champagna

Position-Velocity Diagrams for the Maser Emission coming from a Keplerian Ring

We have studied the maser emission from a thin, planar, gaseous ring in Keplerian rotation around a central mass observed edge-on. The absorption coefficient within the ring is assumed to follow a power law dependence with the distance from the central mass as, k=k0r^{-q}. We have calculated position-velocity diagrams for the most intense maser features, for different values of the exponent q. We have found that, depending on the value of q, these diagrams can be qualitatively different. The most intense maser emission at a given velocity can either come mainly from regions close to the inner or outer edges of the amplifying ring or from the line perpendicular to the line of sight and passing through the central mass (as is commonly assumed). Particularly, when q>1 the position-velocity diagram is qualitatively similar to the one observed for the water maser emission in the nucleus of the galaxy NGC 4258. In the context of this simple model, we conclude that in this object the absorption coefficient depends on the radius of the amplifying ring as a decreasing function, in order to have significant emission coming from the inner edge of the ring.Comment: 13 pages, 7 figures, to appear in the 2007 July 20 issue of The Astrophysical Journa

ASTROP2 Users Manual: A Program for Aeroelastic Stability Analysis of Propfans

This manual describes the input data required for using the second version of the ASTROP2 (Aeroelastic STability and Response Of Propulsion systems - 2 dimensional analysis) computer code. In ASTROP2, version 2.0, the program is divided into two modules: 2DSTRIP, which calculates the structural dynamic information; and 2DASTROP, which calculates the unsteady aerodynamic force coefficients from which the aeroelastic stability can be determined. In the original version of ASTROP2, these two aspects were performed in a single program. The improvements to version 2.0 include an option to account for counter rotation, improved numerical integration, accommodation for non-uniform inflow distribution, and an iterative scheme to flutter frequency convergence. ASTROP2 can be used for flutter analysis of multi-bladed structures such as those found in compressors, turbines, counter rotating propellers or propfans. The analysis combines a two-dimensional, unsteady cascade aerodynamics model and a three dimensional, normal mode structural model using strip theory. The flutter analysis is formulated in the frequency domain resulting in an eigenvalue determinant. The flutter frequency and damping can be inferred from the eigenvalues

Los procesos de construcción de conocimiento agroecológico y la transición hacia agricultura más sustentables en Jalisco, México

El presente trabajo parte de la noción de multifuncionalidad en la agricultura familiar sustentable, y se detiene a analizar la función cultural de la agricultura en la construcción de conocimiento agroecológico en dos experiencias de la región centro de Jalisco. Además, muestra la relevancia de las articulaciones entre diferentes actores sociales para formar redes de construcción e intercambio de conocimientos agroecológicos que fortalecen la transición hacia agriculturas más sustentables y más justas para los agricultores familiares.ITESO A

State tomography of capacitively shunted phase qubits with high fidelity

We introduce a new design concept for superconducting quantum bits (qubits) in which we explicitly separate the capacitive element from the Josephson tunnel junction for improved qubit performance. The number of two-level systems (TLS) that couple to the qubit is thereby reduced by an order of magnitude and the measurement fidelity improves to 90%. This improved design enables the first demonstration of quantum state tomography with superconducting qubits using single shot measurements.Comment: submitted to PR

El desarrollo de las perspectivas feministas en el estudio disciplinar de las Relaciones Internacionales en el mundo y en Argentina

This work presents a state of the art about feminist perspectives in International Relations at a global level, where it briefly addresses epistemological and methodological positioning of feminism to develop the genesis and characteristics of the main feminist approaches in International Relations and their objectives; and in a second section, it reveals the state of the studies in Argentina in particular.Este trabajo presenta un estado de la cuestión sobre las perspectivas feministas en Relaciones Internacionales a nivel global, donde aborda sucintamente el posicionamiento epistemológico y metodológico del feminismo, para desarrollar la génesis y características de los principales enfoques feministas en las Relaciones Internacionales y sus objetivos; y en una segunda instancia, revela el estado de los estudios en Argentina en particular